Locking device



FIG. 1 is a front, top, right perspective view of a locking device according to a first embodiment of our new design;

FIG. 2 is front, top, left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear, top, left perspective view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front, bottom, right perspective view of the locking device in an unlocked position;

FIG. 7 is a is a front, bottom, right perspective view of the locking device in a locked position;

FIG. 8 is a front, top, left perspective view of the locking device in an open and unlocked position;

FIG. 9 is a left side elevational view thereof; and,

FIG. 10 is a rear, top, left perspective view thereof.

The broken lines shown in the Figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a locking device, as shown and described. 